James t



(No Mdel.) Y

J..T .HAYDEN.

'PIPE WRENCH.

No. 335,133. Patented Feb. 2, 1383.

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` Unirse drains JAMES T. I-IAYDEN, OF CHICAGO,

ILLINOIS, ASSIGNOR TO RICHARD T. CRANE, OF SAME PLACE.

PIPE-WRENCH.

` .QPECIFICATION forming part of Letters Pate-nt No.335,193, dated February 2, 1856.

Application filed November 14, 1885.

To all whom, it may concern.-

Beit known that I, JAMEs T. HAYDEN, a citizen of the United States, and residing at Chicago, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement in I)ipe-\V1enches, which is fully set forth in the following specification, reference being had to the accompanying drawings, in which- Figure l represents a plan view of a pipewrench embodying my invention; Fig. 2, a longitudinal section of the saine, taken on theline .fr x of Fig. 1; Fig. 8, a transverse section,tal en on the line y y of Fig. l.; and Fig-l a side elevation.

Like letters refer to like parts in all the iigures of the drawings.

My invention relates to pipe-wrenches, it being in the nature of an improvement upon the invention set forth. in Letters Patent No. 241,490, granted to me May 17, 1881, and has for its object the production of a wrench which shall be more simple and durable in its construction and more effective in its operation.

To these ends my invention consists in eertain novel features, which I will now proceed to describe, and then particularly point out in the claims.

In the drawings, A represents the shank or stem of the Wrench, which consists of a fiat bar provided upon its edges with a screw-thread, c, and having at one end asuitable handle, A, and at the other end the fixed jaw B. This fixed jaw is provided with teeth or serrations b, to properly hold the pipe. Upon the stem A is mounted a sliding block or frame, C, provided withan aperture, c, corresponding to the dimensions of the stem, so that the said block may slide upon the said stem.

D represents a thumb-nut threaded internally to fit upon the screw-thread a of the stem A and mounted in a slot, d, in the block C at right angles to the recess c, as shown in the several figures of the drawings.

E represents the vibrating j aw of the wrench, which is provided with serrations b, similar to those on the ixed jaw. The lower end of the vibrating jaw E extends into and through a recess, F, in the block or frame C, and is provided with a notch or seat, e, into which the thumbnut G projects, as clearly shown in Fig.

Serial No. 182,884. (No model.)

2 of the drawings. The periphery ofthe thumbnut is rounded off, as shown, to permit the vibration of the said jaw E, and the wallf of the recess F on the opposite side is similarly rounded, as shown in Fig. 2 of the drawings, for the same purpose. This wall is preferably formed by means of a separate block secured in place in any suitable manner in the frame C, in order that the parts of the wrench may be readily assembled and taken apart when desired.

The operation of inyimproved wrench is sufficiently obvious from the preceding description. The rotation of the thumb-nut D will move the block C and vibrating jaw E in either direction, as desired, so as to bring the vsaid jaw to a distance from the iixed jaw corresponding to the size of pipe which it is desired to operate upon. As soon as the wrench is applied to the pipe any pressure applied to the handle or stein thereof will cause the vibrating jaw to tend to approach closer to the fixed jaw in a manner common to pipe-wrenches of this general description, and will cause the wrench to grasp the pipe with a grip proportionate to the amount of power applied thereto. The vibrating jaw is not pivoted to the sliding block, but works therein upon two fulcra, the rounded periphery of the nut D forming one fulcruin while the reversely-rounded wall f of the recess F in the block forms the other fulcrum.

In the construction set forth in the Letters Patent hereinbefore specified, to which reference is made-for a description thereof, the entire strain of the power applied to the wrench comes directly upon the ratchet-teeth of the vibrating jaw and the thread of the worm, and tends to rapidly wear and eventually break the said teeth and thread. This difcultyis overcome in the construction hereinbefore setforth, the strain being so distributed as to relieve the' thread and preserve the same, thus greatly increasing the durability ofthe wrench. Moreover, in the construction set forth in the Letters Patent, any adjustment of the vibratin g jaw causes a variation in the distance of the jaw proper from the fulcru 1n, and consequently a difference in the length of the lever and in the power of the leverage. In my improvement, on the other hand, the distance from the IOO fulcru'm to the j aw proper or gri ppug-suriace of the vibrating jaw is constant, and the leverage is therefore constant also.

It is obvious that various modifications in the details of construction may be made without departing from theprinciple of my invention, and l therefore do not wish to be understood as limiting myself strictly to the precise details hereinbefore described and shown in the drawings.

Having thus described my invention,what I claim as new, and desire to secure by Letters 1. The combination, with the threaded stem, of the block mounted to slide thereon, the nut mounted in the block to operate the same, and the vibrating jaw fulcrumed in the block and provided with a notch or recess to receive the l nut, whereby it is heid in position, substantially as and for the purposes specified.

2. The combination, with the threaded stem A, of the block F, mounted to slide thereon,

arranged in a slot in the block, said nut being provided with a curved periphery, and the vibrating jaw E, arranged in a recess in the block, which recess has a rounded wal1,f, at one'side, the said jaw being provided with a notch, e, to receive the nut D on the opposite side, substantially as and for the purposes specified.

JAMES T. HAYDEE.y

Witnesses:

IRVINE MILLER, ADELLE L. PHARE.

the nut D, mounted on the threaded stem and zoI 

